Insulator-pin.



C. G. ETTB.

INSULATOR PIN.

APPLICATION FILED JAN. 15, 1908.

906,003. I Patented Dec. 8, 1908.

UNITED sTATEs PATENT oEEToE.

CHARLES G. ETTE, OF ST. LOUIS, MISSOURI, ASSIGNOR TO ETTE INVESTMENT COMPANY, OF

' ST. LOUIS, MISSOURI, A CORPORATION 0F MISSOURI.

INSULATOR-IIN.

Specication of Letters Patent.

Patented Dec. s, 1908.

Application med January 15, 1908. Serial No. 410,969.

To all whom it may concern:

Be it known that I, CHARLES G. ETTE, a

Icitizen of the United States, residing at St.

Louis, Missouri, have invented a certain new and useful Improvement in Insulator-Pins, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a side elevation of an insulator pin constructed in accordance with my invention, said figure also showing in section an insulator mounted on said pin; Fig. 2 is a sectional view of said pin, taken at right angles to Fig. l; and Fig. 3 is a cross sectional view taken on the line 3-3 of Fig. 1.

This invention relates to insulator pins, namely, devices that are employed for supporting insulators such as are generally used in connection with electric wiring.

The main object of my present invention is to provide a metallic insulator pin which is so constructed that the expansion of the metal from which the pin is formed will not cause the insulator to break.

Another object of my invention is to provide an insulator pin having means for preventing water from entering the hole or opening in the support in which the pin is mounted, thereby preventing said support from rotting around the pin.

Referring to the drawings which illustrate the preferred form of mylinvention, A designates a hollow metallic insulator pin provided at its upper end with a screw-threaded head l on which an insulator B is mounted. The insulatorl is provided with internal screw-threads that fit loosely on the threads of the pin-head l, and said head is provided with yielding material into which the internal threads of the insulator bite and thus securely lock the insulator in position. The cooperating screw-threads on the head ofthe pin and on the interior of the insulator operate to a certain extent to retain the insulator in position, but as the internal bore of the insulator is much larger than the diameter of the pin-head l, there is suiicient play between the threads on the pin-head and on the insulator to permit the metal in the pin. to expand without causing the threads thereon to exert enough pressure on the insulator to break same, the insulators usually being made of glass, porcelain or some other fragile material.

The yielding material on the head of the pin into which the screw-threads of the insulator bite, and thus secure'the insulator in position, can be arranged on the pin-head in variousways. In the preferred form of'my invention, as herein shown, the pin-head is provided with a longitudinally extending slot having a piece of yielding material^2 insertedtherein, said piece of material 2 projecting laterally beyond the head 1 of the pin so that its side edges terminate at approximately the outer edges of the threads on the pin-head, as shown in Fig. 2. Consequently, when the insulator B is screwed onto the head of the pin the threads on the insulator will bite into said piece 2 of yielding material and securely lock the insulator in position.

As shown in Fig. 3, the piece 0f yielding material 2 extends transversely through the head of the pin and does not bear upon the exterior of said head so that the expansion of the metal from which the pin-head is formed has no eect whatever upon the piece of,

yielding material 2. I wish to have it understood, however, that I do not consider my broad idea limited to the construction herein shown for the yielding material could be arranged on the head in various ways without departing from the spirit of my invention, such for example, as by providing the head of the pin at one or more points with rings or washers of yielding material or the head could be provided with holes through whichv the yielding material projected laterally so as to be engaged by the threads on the insulator.

I prefer to use soft rubber for the yielding portion of the pin-head but various other materials could be used such, for example, as leather or even some kind of soft metal such as lead.

The pin is provided at its lower end with fish-hooks or serrations 3 that sink into the support C on which the pin is mounted so as to retain the pin in position, and at the upper end:A of the serrated portion of the pin is a laterally projecting Hangs or collar- 4. that serves to throw off any water that runs down the exterior of the pin. This flange or collar 4 is a very desirable feature of my improved pin for it prevents water from entering the keeps the support `I claim as new and desire to seeureby Letters Patent is:

1. Ahollow metallic insulator pin provided Y' with a screw-threaded head, and a piece of yielding material arranged in an opening in said head and) projecting laterally beyond the threads on said head so that it will be engaged by the screw-threads of an insulator; substantially as described.

2. A metallic insulator pin provided with a screw-threaded head, and a piece of yielding'rnaterial extending transversely through saldhead and adapted to be engaged by the threads o-an insulator; substantially as described. i

eoaoos threads on said head so that it will be engagedv by the threads of an insulator; substantially as described.

4. A metallic insulator pin provided with a screw-threaded head in which a longitudinally extending' slot is formed, said slot dividin the head into two sections, and a piece o' yielding material arranged in said slot and projecting far enough from the head to be engaged by the threads of an insulator; substantially as described.

In testimony whereof l hereunto aiix my signature in the presence of two Witnesses, this 11th day of January 1908.

CHARLES G. ETTE.

Witnesses:

EDW. Sorrwromia WALTER GLARENCE RAITHEL. 

